/*
 * Copyright 2012 alex.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.alex.sharedocholmes.model;

/**
 *
 * @author alex
 */
public abstract class CommonHasId<T> implements HasId<T> {

    @Override
    public abstract T getId();

    public boolean isNew() {
        return getId() == null;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (getId() != null ? getId().hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final HasId<T> other = (HasId<T>) obj;
        if (this.getId() == null && other.getId() == null) {
            return this == obj;
        }
        if (this.getId() != null) {
            return this.getId().equals(other.getId());
        }

        return false;
    }

    @Override
    public String toString() {
        return getClass().getName() + "[ id=" + getId() + " ]";
    }
}
